Structural instability around Tc observed in Hg-1201 by neutron powder diffraction and EXAFS

Physica C: Superconductivity and its Applications 282-287:PART 2 (1997) 1081-1082

Authors:

P Bordet, F Duc, PG Radaelli, A Lanzara, N Saini, A Bianconi, EV Antipov

Abstract:

The structure of HgBa2CuO4+∂ is studied as function of temperature by neutron diffraction and Cu-Kedge EXAFS on the same powder sample with Tc=97K. Both techniques reveal the presence of an anomalous behaviour of the Cu-O in-plane bond length starting at ≈ 140K.

Crystal chemistry and electronic properties of the N=2 Ruddlesden-Popper manganates: Unconventional CMR materials

MATER RES SOC SYMP P 453 (1997) 331-336

Authors:

PD Battle, SJ Blundell, DE Cox, MA Green, JE Millburn, PG Radaelli, MJ Rosseinsky, J Singleton, LE Spring, JF Vente

Abstract:

The crystallography and electronic properties of the Ln(2-x)Sr(1+x)Mn(2)O(7) manganese oxides adopting the n = 2 Ruddlesden-Popper (RP) structure are discussed, focusing on the structural phase diagrams and electronic properties in the vicinity of the Mn + 3.5 oxidation slate and in particular the ease of synthesis of single phases of these materials.

Cs3H(SeO4)(2) at 300 K by high-resolution neutron powder diffraction

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS 53 (1997) 1529-1531

Authors:

R Sonntag, R Melzer, T Wessels, PG Radaelli

Hysteresis of the pressure-induced Jahn-Teller switch in deuterated ammonium copper(II) Tutton salt, (ND4)(2)[Cu(D2O)(6)](SO4)(2)

INORGANIC CHEMISTRY 36:15 (1997) 3382-&

Authors:

AJ Schultz, MA Hitchman, JD Jorgensen, S Lukin, PG Radaelli, CJ Simmons, H Stratemeier

Stripe structure and non-homogeneity of the CuO2 plane by joint EXAFS and diffraction

JOURNAL DE PHYSIQUE IV 7:C2 (1997) 735-740

Authors:

A Bianconi, NL Saini, A Lanzara, M Lusignoli, T Rossetti, PG Radaelli, P Bordet, A Kvick, H Oyanagi